– Advent Children Staff Commentary
Translation of the staff commentary track only available in the Japanese Advent Pieces Limited edition of the original Advent Children.
Translator: Xcomp/LHYeung

– Changes of ACC
A comprehensive look into the changes and additions of ACC from beginning to end.
Author: Makoeyes987

– Visual Updates of ACC
Side-by-side comparisons of the animations between the DVD & the Blu-Ray edition. The article ends at the point where Vincent saves Cloud and is, therefore, incomplete.
Author: X-SOLDIER | Image provider: CloudStrife1992

SPECIAL FEATURE
Magazine: Dengeki PlayStation 3, Vol.445*Advent Children Complete Character Profiles:Tifa Lockhart | Cloud Strife | Aerith Gainsborough | Sephiroth | Zack Fair | Kadaj, Loz and Yazoo | Rufus Shinra and the Turks
Translator: hitoshura
*It is not clear whether the profiles were written directly by Advent Children Complete’s staff. What is clear, however, is that even if Dengeki’s staff wrote these, they did so with information provided by the film’s developers, as demonstrated by the mention of Cloud initially leaving home to seek a cure to Geostigma. This is a plot point not otherwise introduced until the film’s actual release.